Tunze Nano ATO not topping off tank

[Oceanavekid]

I have the tunze nano ATO

Seems like it’s not topping off like it should
I look in the sump and it’s pretty empty I unplug and plug back in the ATO and it fills it back up. It’s not putting water back in the tank on it’s own

Any clue why it’s doing this?

 

[Travis Stewart]

I have the tunze nano ATO

Seems like it’s not topping off like it should
I look in the sump and it’s pretty empty I unplug and plug back in the ATO and it fills it back up. It’s not putting water back in the tank on it’s own

Any clue why it’s doing this?

They have timers set to shut them off for safety if they run too long. You need to fill sump back to normal water level then unplug ATO and plug back in. Then adjust depth a little to test it turns back on.

 

[Oceanavekid]

They have timers set to shut them off for safety if they run too long. You need to fill sump back to normal water level then unplug ATO and plug back in. Then adjust depth a little to test it turns back on.

I’ll try that

 

[Travis Stewart]

There is also two settings. The small little box opens up and settings can be changed depending on tank size.

 

[Oceanavekid]

I haven’t tried to open it

Only have it on a 30G

 

[Oceanavekid]

As you can see my water in the return is a bit high

I finally got it to turn off tho

 

[Oceanavekid]

Supposed to be a switch to turn it to 25-50G

I don’t see a switch

 

[AdamNC]

Page 12 for shorter time
Page 14 for longer time

https://www.tunze.com/fileadmin/gebrauchsanleitungen/x3152.8888.pdf

 

[AdamNC]

That piece it’s pointing to is actually a jumper. You need to pull it out and move it over to just sit on 1 pin.

 

[Wellford]

Have you checked to see if the float in the float sensor is possibly stuck and not dropping down to start the pump as the water level decreases?

 

[Oceanavekid]

That piece it’s pointing to is actually a jumper. You need to pull it out and move it over to just sit on 1 pin.

So I want 1 pin for 25G+?

Right now it’s set up to both pins

 

[Oceanavekid]

Have you checked to see if the float in the float sensor is possibly stuck and not dropping down to start the pump as the water level decreases?

I’m going to check next time my water level drops

Hopefully moving it a bit helped and now it works like it should

 

[AdamNC]

Yea, basically your just taking off the restricting jumper but keeping it in the unit. The one pin is just a place to store it.